2.8 is 4% of what number

Mathematics

1 answer:

AnnZ [28]3 years ago

4 0

70 you solve by making a proportion 2.8/x =4/100

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How many times greater was the temperature in Miami (45) than the lowest in San Diego (25)

Greeley [361]

Answer:

The temperature in Miami is 9/5 times the temperature in San Diego.

Step-by-step explanation:

Ratios

To compare the temperature in Miami (45) with the temperature in San Diego (25), we use the division or ratio between both numbers:

$\displaystyle \frac{45}{25}$

Simplify the fraction dividing by 5:

$\displaystyle \frac{9}{5}$

Since the relation between them is 9/5, it means the temperature in Miami is 9/5 times the temperature in San Diego.

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2 years ago

Find the explicit formula that produces the given sequence. 3/2, 3/4, 3/8, 3/16,...

lara [203]

$\frac{3}{2};\ \frac{3}{4};\ \frac{3}{8};\ \frac{3}{16};\ ...\\\\a_1=\frac{3}{2}\\\\a_2=\frac{3}{4}=\frac{3}{2}\cdot\frac{1}{2}\\\\a_3=\frac{3}{8}=\frac{3}{4}\cdot\frac{1}{2}=\frac{3}{2}\cdot\left(\frac{1}{2}\right)^2\\\\a_4=\frac{3}{16}=\frac{3}{8}\cdot\frac{1}{2}=\frac{3}{2}\cdot\left(\frac{1}{2}\right)^3\\\vdots$
$a_n=\frac{3}{2}\cdot\left(\frac{1}{2}\right)^{n-1}=\frac{3}{2}\cdot\left(\frac{1}{2}\right)^{-1}\cdot\left(\frac{1}{2}\right)^n=\frac{3}{2}\cdot2\cdot\left(\frac{1}{2}\right)^n=3\cdot\left(\frac{1}{2}\right)^n$

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2 years ago

PLS I NEED HELP PLSSSSSSSSSS

Oksana_A [137]

3 cm I think I hope this helps

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2 years ago

M+ 2/3=1/4m- what the value of

Elena L [17]

Answer:

Step-by-step explanation:

subtract m from both sides and you get - 3/4m

divide 2/3 divided by -3/4

-8/9

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2 years ago

A neutral atom of oxygen has 8 protons and __ electrons

a_sh-v [17]

Pretty sure it’s 8 electrons

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2 years ago

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